in tetrahydrofuran T=60°C;

1: 96 percent / H2, Pd/C (10percent) / ethanol / 4 h / Ambient temperature 2: 1) NaH (80percent in paraffine oil) / 1) 30 min, r. t., THF, 2) 6 h, reflux, THF View Scheme

sodium hydride 1) 30 min, r. t., THF, 2) 6 h, reflux, THF; Yield given. Multistep reaction;